How to apply?
The official WSJT-website of Dr. Joe Taylor, K1JT with the latest full-versions for Windows, Mac and Linux, the user-guides in English, German and Swedish and all the release notes:
WSJT-X improved download by DG2YCB
FT8DMC Digital Mode Club
If you find any other good and helpful links or info about FT4 please tell us so we can add them to our website.